A Si IV/O IV electron density diagnostic for the analysis of IRIS solar spectra

P. R. Young, F. P. Keenan, R. O. Milligan +1

Solar spectra of ultraviolet bursts and flare ribbons from the Interface Region Imaging Spectrograph (IRIS) have suggested high electron densities of $>10^{12}$ cm${}^{-3}$ at transi…